Improved scaffold and ladder



fuient (Miller.

Letters Patent No. 99,706, dated Febrzimy 8,1870.

IMPRoimD SCAFIOLD AND LADDER.

The Schedule referred to in rthese Letters Patent and making part of thesame.

To all whom it may conce/rn:

Be itknowu that I, J. E. RAUGH, oi' Selins Grove, in the county of'Snyder, and in the State of 4Iennsylvania, have inventedV certain newand useful Im provements in Combined Ladder and Elevating-Scafl' fold;and do hereby declare that the following is-a full,

clear, and exactdeseripiion thereof,.reference beingA had to theaccompanying drawings and lto the letters of' reference marked thereon,making a part'of this specitication.

. The nature of my invention consists in the construction andarrangement ot'a combined ladder and elevating-scaffold, for painters orother mechanics7 use.

In order to enable others skilled in the art towhich my inventionappertains to make and use the same, I will no w proceed to describe itsconstruction and operation, referring to the annexed ,-drawings, inwhich- Figure l is a side elevation, and

Figure 2, a -front View of' the entire ladder and scaffold;

Figure is a perspective view of` au extra foundationframe;

Figure 4 is a plan view of a frame, att-ached to the toppt' the ladder,f'or the purpose of' keeping the laddertout from the building;

Figure 5 is a side view of a pulley; and

Figure 6 is a horizontal section of a portionof'the machine, tobehereinafter described.

A represents the main ladder, made of any desired height, hav-ing twobraces, B B, :hinged a suitable distance from its lower end. Ilhesebraces are connected `by cross-bars, so as to f'orm a sort ot'foundation-frame for the ladder, it being the intention that the la-ddershould not itself' rest on the ground, but be supported by the braces orlegs B B. v

In mortises on the braces B B are secured segmental bars, C C,which"project inward, and pass through mortlses in the sides of theladder A, where they are 4held at any point desired by means of' pins,as seen in fig. 1. -By this means', the foundationframe can'be placed atany angle desired from the main ladder.

At suitable points on the inner side of 'the main ladder A are securedmetal plates or bars, which form guides to hold an additional ladder, D,within the sides of' the main ladder A, allowing the ladder .D to slideup and dou-'n with ease, but` preventing it from becoming separated fromthe .main ladder, unless so desired. 4

The extension ladder D is raised, by hand, as the workman passes up onthe main ladder,.and it is held at any point desired, by means of ahook, a, secured to one of the rounds ofthe sliding ladder, and thrownover any of' the rounds of the main ladder.

In addition to this, a pin, b, is passed through the i side of thesliding ladder into the side of' the main ladder, as seen in lg. 2, bywhich means the sliding ladder D is firmly and securely held at anyheight desired.

At the upper end of the sliding ladder' D is attached a crossfbar, E, bymeans of pins or other suit able devices, so as to be Areadily. removedand put on. lEhis cross-bar E extends a suitable distance beyond thesides of the ladder D, and is at each end provided with a small wheel orroller, G, which bears against the side of the building, so astofacilitate the raising of' the ladder.` In attaching the cross-bar E tothe ladder D, it should be done in such a manner that the cross-bar` canturn, it being rounded on the edge nearest to. the ladder, for thatpurpose. y

Near one end of' the cross-bar E is hinged an arm, I-I, having a metalpoint, e, atits outer end, and braced by the rod d, in the positionshown in tig. 4;.

To the opposite side of' the bar E is secured a rod or lever, f, from,the outer end of which `a cordior rope, c, hangs suspended. 4.

Then the ladder is being raised, the arms H H hang downward, allowingthe wheels G G to bear against the side of the building; but as soon asit has been raised to the desired height, by pulling on the rope e, thebar E will be turned so as to bring the arms H H horizontally inwardtoward -t'he building, the points c c holding them steady, thus keepingthe entire ladder in its properA position.

If the building should not be high enough to neeesi sitate the use ofthe sliding ladder D, the frameE G H isv attached to the upper end ofthe main ladder A. The means for attaching said frame to. either one ofthe ladders maybe of various constructions; but I prefer the meansparticularly shown in gs. l and 4, consisting ot' staples inserted inthe bar E, and pins ,hungon said staples,-these pins being passedthrough the sides of' the ladders and held by other smaller' pins,

as shown iu figs. 1 and 2. The slidiugladderD being narrower than themain ladder A, there are blocks :1t-

tached to the sides of' the sliding ladder at the top, so-

of the arms J J, and are provided with square loops h 71., proiectingbelowI the a1ms,and through said loop,

a wedge-shaped bar, M, is passed, which effectually se-' cures theplatform to the carriage. v

Under the platform K is secured alatch, N, pressed port the carriage andplatform at any desired height.

On the open side of the carriage I is placed a windlass, 0, having itsbearings in the sides of the carriage, which extend forward beyond thefront side of the ladder.

From they windlass O'a rope, k, leads upward around a pulley, m,suspended from the top round of the ladder D, and then passes downwardon the inner side of the ladder, and is attached to the carriage I. Byturning the windlass the carriage and platforms are raised and lowered`at will, the crank of the wiudlass being held, when desired,.by a book,n.

vVhen the carriage is to be lowered, the latch N will be withdrawn by arope or cord, p, attached to its tinner end, as shown in iig. 1.

At the upper end of the carriage I, above the windlass O, is placed aroller,-P, which bears against the front side of the ladder and preventsfriction in the raising and lowering of the carriage.

When the carriage I rises above -the main ladder A and follows thesliding ladder D, there would be a space left between said slidingladder andthe sides of the carriage, which would cause the carriage tovibrate or move from side to side. To prevent this, I provide bars It R,which are placed in between the vcarriage and sliding ladder, in groovesprovided for that purpose, on thevinside of the sides of the carriage.The bars R R are placed on the side of the ,earriage, in suitableguides, until they are wanted. At the upper ends of said bars are pins,which rest on the top of the side of the carriage, so as to be carriedupward with the carriage to the top of the sliding ladder.

When it is desired to have a long scaffold, two of these machines areplaced at suitable distance apart,

smoel 2 v and the beards forming the scabld are placed on a roller, S',running across the platform K, as seen in iig. 1. The object oftherollers S ls, that as the platforms are raised,.the boards will not morethe platforms any farther apart, but allow them to remain in the sameposition as when pnt up.

If the main ladder A should be long enough for th building, the slidingladder D may be taken out and the fbundation-frame .l, the constructionof which is plainly shown in iig. 3, bolted to the same at its lowerend. By then having` an extra carriage and upper brace-frame, theworkman has two machines upon which to place his scaffold.

Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. The arrangement upon the lower end of the ladder A of the braces B Band segmental bars C C, substantially as shown and described.

2. lhe combination ofthe cross-bar E, wheels G G, arms H H, points c c,braces (l d, lever f, and cord e, all substantially as andfor thepurposes herein set forth. f

3. The carriage I, platform K, and latch N, constructed and arranged tooperate in connection with the rounds ofthe ladder, substantially in thcmanner and for the purposes herein set -forth.

4. In combination with the carriage I and sliding ladder D, the bars RR, substantially for the purposes herein set forth.

5. The combination of the fbundation-frame B C, ladders A D, top frame EG H, carriage I, platform K, latch N, windlass O, bars It R, and rollersP S, all' constructed and arranged to operate substantially in themanner and for the purposes herein set forth.

In testimouy'that'I claim the foregoing, I have here unto set my hand,this 10th day of J anunry,.1870.

J. E. RAUCH.

Witnesses C. L. EvER'r, C. M; ALEXANDER.

